<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>网格内放置元素</title>
    <style>
        .wrapper {
            display: grid;
            grid-template-rows: 1fr 1fr 1fr;
            grid-template-rows: 100px 100px;
            gap: 10px;
        }
        .wrapper > div {
            text-align: center;
            line-height: 100px;
            background-color: #a5a5a5;
        }
        .box1 {
            grid-column: 2/4;
            grid-row: 1;
        }
        .box2 {
            grid-column: 1;
            grid-row: 1/3;
        }
        .box3 {
            grid-column: 2;
            grid-row: 3;
        }
    </style>
</head>
<body>
<div class="wrapper">
    <div class="box1">One</div>
    <div class="box2">Two</div>
    <div class="box3">Three</div>
</div>
</body>
</html>